/*
 * Copyright 2012-2025 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.assertj.core.api.localdatetime;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.BDDAssertions.then;
import static org.assertj.core.error.ShouldHaveDateField.shouldHaveDateField;
import static org.assertj.core.util.AssertionsUtil.expectAssertionError;
import static org.assertj.core.util.FailureMessages.actualIsNull;

import java.time.LocalDateTime;

import org.junit.jupiter.api.Test;

class LocalDateTimeAssert_hasNano_Test {

  @Test
  void should_pass_if_actual_is_in_given_nanosecond() {
    // GIVEN
    LocalDateTime actual = LocalDateTime.of(2021, 12, 31, 23, 59, 55, 15);
    // WHEN/THEN
    then(actual).hasNano(15);
  }

  @Test
  void should_fail_if_actual_is_not_in_given_second() {
    // GIVEN
    LocalDateTime actual = LocalDateTime.of(2021, 12, 31, 23, 59, 55, 15);
    int expectedNanosecond = 58;
    // WHEN
    var assertionError = expectAssertionError(() -> assertThat(actual).hasNano(expectedNanosecond));
    // THEN
    then(assertionError).hasMessage(shouldHaveDateField(actual, "nanosecond", expectedNanosecond).create());
  }

  @Test
  void should_fail_if_actual_is_null() {
    // GIVEN
    LocalDateTime actual = null;
    // WHEN
    var assertionError = expectAssertionError(() -> assertThat(actual).hasNano(1));
    // THEN
    then(assertionError).hasMessage(actualIsNull());
  }
}
